private void newDepToolStripMenuItem_Click(object sender, EventArgs e) { Department dep = new Department(); dep.SetId(client.GetCurIdentity("Department") + 1); DepartmentForm df = new DepartmentForm(dep); df.ShowDialog(); dep = df.dep; if (dep.Id != 0) { client.SetDepartment(dep); //_waitForResponse.WaitOne(); treeViewDepEmpl.BeginUpdate(); treeViewDepEmpl.Nodes.Add(new TreeNode(dep.Name)); treeViewDepEmpl.EndUpdate(); } }